Results 131 to 140 of about 68,122 (285)
Method of protecting a surface with a silicon-slurry/aluminide coating [PDF]
, 1982 A low cost coating for protecting metallic base system substrates from high temperatures, high gas velocity oxidation, thermal fatigue and hot corrosion is described. The coating is particularly useful for protecting vanes and blades in aircraft and land
Deadmore, D. L., Young, S. G.
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Materials & DesignThe Ti-6Al-4V (Ti64) alloy, modified with Fe and B via laser-directed energy deposition (LDED), exhibits significant microstructural refinement and an enhanced synergy between strength and ductility.
Wanwan Yang +14 more
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Understanding the roles of the strategic element cobalt in nickel base superalloys [PDF]
The United States imports over 90% of its cobalt, chromium, columbium, and tantalum, all key elements in high temperature nickel base superalloys for aircraft gas turbine disks and airfoils. Research progress in understanding the roles of cobalt and some
Dreshfield, R. L., Stephens, J. R.
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Materials & DesignThe nucleation and growth of topologically close-packed (TCP) phases in Ni-based single crystal superalloys (SCs) are controlled by composition, temperature, time, interface structure and stress.
Yuan Cheng +5 more
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The effect of alloying on gamma and gamma prime in nickel-base superalloys [PDF]
An investigation was conducted to determine the compositional limits of gamma and gamma prime phases in nickel-base superalloys. Fifty-one nickel-base alloys were melted under vacuum and heat treated for 4 hours at 1190 C followed by 1008 hours at 850 C.
Dreshfield, R. L., Wallace, J. F.
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Advanced tungsten fiber-reinforced nickel superalloy [PDF]
, 1974 Matrix composition, fabrication technique, and fiber diameter were selected to minimize fiber-matrix reaction and preserve composite strength. Composites may be used in place of superalloys where higher strength or greater strength-to-density ratios are ...
Petrasek, D. W., Signorelli, R. A.
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Journal of Materials Research and TechnologyThe creep properties at 800 °C and 735 MPa were examined in Ni-based single crystal superalloys (SCs) with different microstructure characteristics to systematically investigate the effects of initial microstructure on the creep property at mediate ...
Huanchang Duan +8 more
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Hydrogen environment embrittlement of astroloy and Udimet 700 (nickel-base) and V-57 (iron-base) superalloys [PDF]
The sensitivity to hydrogen environment embrittlement of three superalloys was determined. Astroloy forgings were resistant to embrittlement during smooth tensile, notched tensile, and creep testing in 3.5-MN/sq m hydrogen over the range 23 to 760 C. The
Gray, H. R., Joyce, J. P.
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Enhancing strength and toughness of 2-GPa-grade press-hardened steel by novel electroshock treatment
Materials & DesignThis study combined electroshock treatment (EST) with conventional hot stamping to address the poor toughness and strength–toughness trade-off in 2-GPa-grade press-hardened steels.
Ye Li +6 more
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P/M superalloys: A troubled adolescent? [PDF]
The history of powder metallurgy P/M superalloy technology is reviewed with a comment on the state of the art, and speculates on the technology's future potential growth and ...
Dreshfield, R. L., Gray, H. R.
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